Sizing Test & Feedback
Enter a real customer's measurements in each calculator, check the size it returns, then tell us what you'd actually give them. Cases the tool isn't sure about are marked Edge case – needs your ruling.
1. P1 Rib Protector
P1 Rib Protector
Size Chart
| Size | Inches | Centimeters |
|---|---|---|
| MINI | 19" - 22" | 48 - 56 cm |
| C | 22" - 26" | 56 - 66 cm |
| XS | 26" - 32" | 66 - 81 cm |
| S | 32" - 36.5" | 81 - 93 cm |
| M | 36.5" - 40" | 93 - 102 cm |
| L | 40" - 44" | 102 - 112 cm |
| XL | 44" - 48" | 112 - 122 cm |
Sizing Tips
- Take chest measurements with a tape pulled tight around the chest.
- For men and young children: measure at nipple height.
- For ladies: measure as high up under the bust as possible.
- Breathe in and out, noting the average circumference.
- If between sizes, choose the smaller size.
- The fit should be snug with no gaps—like a crash helmet.
- Use the additional rear adjustment before sizing up.
2. P1 DEFENDER
P1 DEFENDER
Size Chart
| Size | Driver Height (mm) | Chest (cm) |
|---|---|---|
| C | < 1160 | 63 - 73 |
| C+ | 1160 - 1340 | 69 - 78 |
| XS- | 1340 - 1520 | 59 - 68.5 |
| XS | 1340 - 1520 | 70 - 80.5 |
| XS+ | 1340 - 1520 | 78 - 89 |
| S- | 1520 - 1700 | 68 - 80.5 |
| S | 1520 - 1700 | 78 - 90.5 |
| S+ | 1520 - 1700 | 88 - 106 |
| M- | 1700 - 1880 | 78 - 92 |
| M | 1700 - 1880 | 88 - 106 |
| M+ | 1700 - 1880 | 98 - 118.5 |
Note: Drivers over 1.88m should choose the M sizes.
Sizing Tips
- Height must fit within the correct "Driver height" window, or one category shorter.
- Take chest measurements with a tape pulled tight at nipple height.
- Breathe in and out, noting the average circumference.
- If between sizes, choose the smaller size.
- Use the additional 30mm rear adjustment before sizing up.
- It is more comfortable to use the height category below your actual height (allowed by regulations).
- If your chest falls outside your height range, a special size may be required.
